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Panic in getSignaturesOfType on a decorator's contextual type in JS API #64863
Description
🔎 Search Terms
getSignaturesOfType, panic
🕗 Version & Regression Information
Compiled on the latest main (5237fd4)
⏯ Playground Link
No response
💻 Code
// panic.ts
import { API, SignatureKind } from '@typescript/typescript/sync';
import { isDecorator, type Node } from '@typescript/typescript/ast';
import { createFileSystem } from '@typescript/typescript/fs';
const file = '/repro.ts';
const api = new API();
const snapshot = api.createSnapshot({
fileSystem: createFileSystem([[file, `
class C { @((target, context) => target) get value(): number { return 1; } }
`]]),
createPrograms: [{ rootFiles: [file], compilerOptions: { noLib: true } }],
});
const program = snapshot.operation.createdPrograms[0]!;
const source = program.getSourceFile(file)!;
const checker = program.getProject().checker;
function visit(node: Node): void {
if (isDecorator(node)) {
const type = checker.getContextualType(node.expression)!;
checker.getSignaturesOfType(type, SignatureKind.Call);
}
node.forEachChild(visit);
}
visit(source);and then
node panic.ts
🙁 Actual behavior
> node panic.ts
file:///Users/auvred/dev/github/typescript/packages/typescript/dist/api/syncChannel.js:248
throw new Error(this._msgPayload.toString("utf-8"));
^
Error: panic: runtime error: invalid memory address or nil pointer dereference
goroutine 1 [running]:
runtime/debug.Stack()
/Users/auvred/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.27.0.darwin-arm64/src/runtime/debug/stack.go:26 +0x64
github.com/microsoft/TypeScript/tsc/internal/ipc.(*SyncConn).handleRequest.func1()
/Users/auvred/dev/github/typescript/tsc/internal/ipc/conn_sync.go:136 +0x50
panic({0x10363c468?, 0x10378e120?})
/Users/auvred/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.27.0.darwin-arm64/src/runtime/panic.go:859 +0x120
github.com/microsoft/TypeScript/tsc/internal/ast.(*SourceFile).getDataCell[...](0x10295c840?, 0x55295c9e9588?)
/Users/auvred/dev/github/typescript/tsc/internal/ast/ast.go:2342 +0x30
github.com/microsoft/TypeScript/tsc/internal/ast.(*SourceFile).GetOrComputeData[...](0x103393be0, 0x55295c9e95b8, 0x103758510?)
/Users/auvred/dev/github/typescript/tsc/internal/ast/ast.go:2330 +0x2c
github.com/microsoft/TypeScript/tsc/internal/api/encoder.GetNodeIndexTable(...)
/Users/auvred/dev/github/typescript/tsc/internal/api/encoder/encoder.go:417
github.com/microsoft/TypeScript/tsc/internal/api.nodeHandleFrom(0x55295c870360)
/Users/auvred/dev/github/typescript/tsc/internal/api/session.go:296 +0x68
github.com/microsoft/TypeScript/tsc/internal/api.(*snapshotData).nodeHandleFrom(...)
/Users/auvred/dev/github/typescript/tsc/internal/api/session.go:175
github.com/microsoft/TypeScript/tsc/internal/api.(*snapshotData).newSignatureResponse(0x55295cb0a008?, {0x55295c7e2e10?, 0x0?}, 0x55295c7bc5f0)
/Users/auvred/dev/github/typescript/tsc/internal/api/session.go:505 +0x70
github.com/microsoft/TypeScript/tsc/internal/api.checkerSetup.newSignatureResponse(...)
/Users/auvred/dev/github/typescript/tsc/internal/api/session.go:758
github.com/microsoft/TypeScript/tsc/internal/api.(*Session).handleGetSignaturesOfType(0x55295c7e3020?, {0x103755160?, 0x55295c9deac0?}, 0x55295c8751e0)
/Users/auvred/dev/github/typescript/tsc/internal/api/session.go:2955 +0x16c
github.com/microsoft/TypeScript/tsc/internal/api.(*Session).HandleRequest(0x55295ca32000, {0x103755160?, 0x55295c9deac0?}, {0x55295c7e3020, 0x13}, {0x55295cb020a0?, 0x43?, 0x43?})
/Users/auvred/dev/github/typescript/tsc/internal/api/session.go:997 +0x3418
github.com/microsoft/TypeScript/tsc/internal/ipc.(*SyncConn).handleRequest(0x55295c986d80, {0x103755160?, 0x55295c9deac0?}, 0x55295c7deaf0, 0x0)
/Users/auvred/dev/github/typescript/tsc/internal/ipc/conn_sync.go:152 +0x454
github.com/microsoft/TypeScript/tsc/internal/ipc.(*SyncConn).Run(0x55295c986d80, {0x103755160, 0x55295c9deac0})
/Users/auvred/dev/github/typescript/tsc/internal/ipc/conn_sync.go:79 +0x144
github.com/microsoft/TypeScript/tsc/internal/api.(*StdioServer).Run(0x55295c9e9d18, {0x103755160, 0x55295c9deac0})
/Users/auvred/dev/github/typescript/tsc/internal/api/server.go:134 +0x598
main.runAPI({0x55295c942020, 0x3, 0x3})
/Users/auvred/dev/github/typescript/tsc/cmd/tsc/api.go:83 +0x2b8
main.runMain()
/Users/auvred/dev/github/typescript/tsc/cmd/tsc/main.go:26 +0xbc
main.main()
/Users/auvred/dev/github/typescript/tsc/cmd/tsc/main.go:15 +0x1c
at SyncRpcChannel.requestBytesSync (file:///Users/auvred/dev/github/typescript/packages/typescript/dist/api/syncChannel.js:248:31)
at SyncRpcChannel.requestSync (file:///Users/auvred/dev/github/typescript/packages/typescript/dist/api/syncChannel.js:169:29)
at Client.apiRequest (file:///Users/auvred/dev/github/typescript/packages/typescript/dist/api/sync/client.js:57:37)
at ProjectObjectRegistry.<anonymous> (file:///Users/auvred/dev/github/typescript/packages/typescript/dist/api/sync/api.js:1547:39)
at TypeObject.<anonymous> (file:///Users/auvred/dev/github/typescript/packages/typescript/dist/api/sync/api.js:4815:61)
at Checker.<anonymous> (file:///Users/auvred/dev/github/typescript/packages/typescript/dist/api/sync/api.js:3088:55)
at visit (file:///private/tmp/ts-api-decorator-panic/panic.ts:20:17)
at RemoteNodeList.forEachNode (file:///Users/auvred/dev/github/typescript/packages/typescript/dist/api/node/node.generated.js:123:28)
at RemoteNode.forEachChild (file:///Users/auvred/dev/github/typescript/packages/typescript/dist/api/node/node.generated.js:209:46)
at visit (file:///private/tmp/ts-api-decorator-panic/panic.ts:22:10)
Node.js v24.18.0
🙂 Expected behavior
No panic
Additional information about the issue
No response
Activity